"vital function" meaning in English

{
  "forms": [
    {
      "form": "vital functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vital function (plural vital functions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
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          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
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          "source": "w"
        },
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          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Biology",
          "orig": "en:Biology",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Any function of the body that is essential for maintaining life, especially breathing and circulation."
      ],
      "id": "en-vital_function-en-noun-PNHwecNk",
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "breathing",
          "breathing"
        ],
        [
          "circulation",
          "circulation"
        ]
      ],
      "raw_glosses": [
        "(biology) Any function of the body that is essential for maintaining life, especially breathing and circulation."
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "body function",
          "word": "vitaalitoiminto"
        }
      ]
    }
  ],
  "word": "vital function"
}

{
  "forms": [
    {
      "form": "vital functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vital function (plural vital functions)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "en:Biology"
      ],
      "glosses": [
        "Any function of the body that is essential for maintaining life, especially breathing and circulation."
      ],
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "breathing",
          "breathing"
        ],
        [
          "circulation",
          "circulation"
        ]
      ],
      "raw_glosses": [
        "(biology) Any function of the body that is essential for maintaining life, especially breathing and circulation."
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "body function",
      "word": "vitaalitoiminto"
    }
  ],
  "word": "vital function"
}